Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-04-01 → 2025-06-30 |
| MCL | Health-based | Resolved | 2025-04-01 → 2025-06-30 |
| MCL | Health-based | Resolved | 2025-04-01 → 2025-06-30 |
| MCL | Health-based | Resolved | 2025-01-01 → 2025-03-31 |
| MCL | Health-based | Resolved | 2025-01-01 → 2025-03-31 |
| MCL | Health-based | Resolved | 2025-01-01 → 2025-03-31 |
| TT | Health-based | Resolved | 2018-01-01 → 2018-01-31 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 1060.5 µg/L 82% of the EPA limit 1300 µg/L
worst single sample: 1400 µg/L | 50/50 | SYR4 | 2012–2017 |
| Chloroform | 53.78 µg/L No EPA limit set
worst single sample: 55.1 µg/L | 32/32 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 30.72 µg/L No EPA limit set
worst single sample: 34 µg/L | 32/32 | SYR4 | 2012–2019 |
| TTHM | 55.68 µg/L 70% of the EPA limit 80 µg/L
worst single sample: 58.3 µg/L | 32/32 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 99.395 µg/L 166% of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 102.8 µg/L | 32/32 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 66.25 µg/L No EPA limit set
worst single sample: 69 µg/L | 32/32 | SYR4 | 2012–2019 |
| Bromodichloromethane | 2.6 µg/L No EPA limit set
worst single sample: 3.18 µg/L | 31/32 | SYR4 | 2012–2019 |
| Lead | 14.8 µg/L 99% of the EPA limit 15 µg/L
worst single sample: 26.9 µg/L | 31/50 | SYR4 | 2012–2017 |
| Monochloroacetic Acid | 5.215 µg/L No EPA limit set
worst single sample: 5.3 µg/L | 18/32 | SYR4 | 2012–2019 |
| Lead | 0.0019 mg/L 13% of the EPA limit 0.0150 mg/L | 8/8 | LCR | 2023 |
| Barium | 5.317 µg/L 0.3% of the EPA limit 2000 µg/L
worst single sample: 5.48 µg/L | 3/3 | SYR4 | 2012–2014 |
| Combined Radium (-226 And -228) | 0.1500 pCi/L 3% of the EPA limit 5 pCi/L | 1/3 | SYR4 | 2012–2017 |
| Toluene | 0.6600 µg/L 0.1% of the EPA limit 1000 µg/L | 1/13 | SYR4 | 2012–2019 |
39 contaminants tested, none detected
Utility contact
Frequently asked questions about South Tongass Water Utility
Is South Tongass Water Utility tap water safe to drink?
EPA monitoring detected 13 contaminants in South Tongass Water Utility's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in South Tongass Water Utility's water?
EPA monitoring detected Copper, Chloroform, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does South Tongass Water Utility serve?
South Tongass Water Utility reports serving 975 people in Alaska, per its EPA record.
Has South Tongass Water Utility had any water quality violations?
The EPA has 43 violations on file for South Tongass Water Utility, of which 25 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.